Improvement in adding-mach ines



M. NORGREN'. Adding-Machine.

No. 209,977. Patented Npv. 19,1878.-

NAPETERS. PMOYOLITHOGRAPMER. WASHINGTON, nv C.

UNITED STATES PATENT FFICE.

MARTIN NORGREN, OF CHICAGO, ILLINOIS.1

IMPROVEMENT IN ADDING-MACHiNES.

lSpecilication l'orining part of Letters Patent N0. 209,97?, dated November I9, 1878; application filed April ll, 1878.

To all l107mm it muy concern:

Be itknown that I, MARTIN NonennN, of Uhicago, in the county ot' Cook and State of Illinois, have invented a new and Improved Addinghiaehiue, as fully set forth in the iollowing speciiication:

The nature of my invention relates to the so-called Larithniometers7 or calculatingmachines,77 and is particularly adapted for addition.

My invention consists in a ringer receiving its impulse from a lever and moving in one direction only, and registering consecutively, by addition, the numbers pointed out by said lever; in two small dials, impulse to the iingers en which is transmitted from the unit dial-finger, one of which indicates the hundreds and the other one the thousands 5 and in the construction and arrangement ot' the operating mechanism, as more fully hereinalter explained.

In the drawing, Figure l represents an ey terior perspective view ofthe addingmaehine; Fig. a sectional plan, and Fig. 3 a sectional bottom view, ot' the operatingmechanism, and Fig 'f ertical transverse section of the same.

A is the dial-plate, graduated into one hundred divisions near its periphery, and having two small dials, a and of', each graduated int-o ten divisions, one otl which is to indicate the hundreds and the other one the thousands. To the under side of this dial-plate is secured a 'l'ralne composed ot disk C, spider-plate D, bar D', and connecting-studs d, di, and d'2, which trame is inclosed in cylindrical case E.

F is a lever, havin g a pointer, f, at one end and a knob-handle, j", at its opposite end, and being secured upon the end of a spindle, g, ln'ojected through the center ofthe dial-plate, and pivoted into the disk C. Upon the lower portion ot' this spindle g is rigidly secured a ratchet-wheel, G, the face ot' which carries a projectin lug, h, which, in combination with the stop II, projecting from disk C, will arrest the inoven'ient ot' wheel G, and a spiral spring, i', one end olA which being' secured to the hub of wheel G', while its opposite end is connected with stud d2 ot' the framework, will cause said wheel G and lever F to return to their startingp'oint alter each motion.

I is a larger ratchet-wheel, the hub ot which is loosely sleeved upon the spindle g, and is projected through the dial-plate, where it carries an indicating-inger, J. Against the face ot this ratchet-wheel I is pivoted a pawl, j, having a suitable spriu g to compel its engagement with the teeth of the ratchet-wheel G, so that said wheel Gr will impart motion to wheel I in one direction, but not in the other, a pawl, k, pivoted on stud dl, holding' it from turning back with said wheel G'.

As will be seen by the above-described arrangement, exactly the saine distance ot forward travel ot lever F is transmitted to linger J but while the former returns to its starting-point the latter will hold its acquired position, thus adding the distance of the motions of lever F and the numbers indicated thereby consecutively on the dial-plates.

The disk L, the spindle otl which carries the iinger I, has ten notches in its rim equal distances apart, and a tumbler plate, M, de pressed by a suitable spring, has a projeetin lug, m, which engages with one ot the notches in said disk and holds the same stationary until said tumbler is lifted by a pin, n, pro.

jectiug from the face of wheel I, which pin at the same time engages with one ot' the notches and rotates said disk one-tenth ot' a revolution, after which it releases said tumbler again for relooking the disk. rlhis disk L will make one-tenth. ot' a revolution for every one revolution otl wheel I, and the linger Z coupled thereto will indicate hundreds.

O is a disk, similar' in every respect with disk L, the spindle ot' which carries the tinger 0, it having ten notches and a tumbler-plate, I, with projecting lug p, for holding said disk from turning until a stud, N, projecting from the faceot' disk L, lifts said tumbler, and at the salue time engages with one ot' the notches and turns said disk one-tenth ot a revolution t'or every revolution of disk L, and the finger o connected to its spindle will indicate thousands.

'Ihe projecting lugs m and y) et' the tumblerplates M and l are made slanting, so that said disks L or O may be turned backward by their indieatingiingers.

This machine is uset'ul not only l`or adding up igures, but also for keeping account of the gross receipts during a day, week, or month 5 and by coupling the lever F With any moving part of a machine or punch the number of revolutions or strokes or the number of passenger-fares can be registered thereby.

What I claim as my invention is- 1. The dial-plate A of an adding-machine, arranged with lever F, having spindle g, ratchet-wheel G, stop H h, and spring e', in combination with thc ratchet-Wheel I, sleeved upon said spindle g, having indicating-fm ger J and pawlsj and lc, all constructed and arranged Within a suitable frame, and operating substantially as herein set forth.

2. Thewheel I, having stud a, the notched disk L, having indicating-finger l, stud N, and tumbler M, and the notched disk O, having indicating-finger o and tumbler P, all constructed and arranged to operate in combinaf tionwith an adding-machine, substantially in the manner set forth.

3. In combination with the dial-plate A, lever F, having spindle g, ratchetwheel G, stop H h, and spring i, the ratchet-wheel I,

carrying indicating-linger J, pawl j, and stud 

